MARKET INTELLIGENCE 市场情报 JNA September/October 2024 | 85 All teal sapphire pictures courtesy of The Gem and Jewelry Institute of Thailand (Public Organization) 所有蓝绿色蓝宝石图片均由GIT泰国珠宝 学院提供 light sources. The stone should also show no distinct bands of colour zoning. It must weigh at least half a carat and be either unheated or conventionally heat treated. And the stone must have a homogeneous colour from a face-up view with at least 20 per cent brilliancy. According to Prasongpongchai, these standards specify that the stone’s colour must not fall within the designated range of blue sapphire master stones. GIT then uses the Munsell colour chart to determine the precise colour name. “We updated our grading criteria and began implementing this practice based on the new standards,” he explained. “The main objective is to minimise consumer confusion between blue sapphires and teal sapphires. This new approach helps us ensure that greenish-blue sapphires are not classified as blue sapphires.” Bespoke appeal According to GIT, demand for teal sapphire has grown in recent years, particularly in the contemporary jewellery market. The stone’s distinctive hue and rarity make it a desirable alternative to traditional blue sapphires and other gemstones. Its versatile colour complements a wide range of skin tones and metal settings, making it an excellent choice for jewellery such as engagement rings, pendants and earrings. Its mesmerising shade is also favoured by those seeking something different and rare. In addition, teal sapphires are highly durable, ranking 9 on the Mohs scale of hardness. This makes them suitable for everyday wear, including in rings and bracelets that might be subject to more wear and tear. Teal sapphires are mined in several locations around the world, with some of the most notable sources being in Australia, Madagascar, and Montana in the US. Australian teal sapphires are particularly renowned for their deep, vibrant colours, while those from Montana often feature lighter, more subtle shades with unique colour zoning that adds to their appeal. The stone’s value is determined by factors such as colour, clarity, cut and carat weight. Stones with a well-balanced mix of blue and green, high clarity and an excellent cut tend to command higher prices. Larger, high-quality teal sapphires are particularly hard to find and can be quite valuable, GIT noted. 蓝绿色蓝宝石蕴含迷人的色调和特质，逐 渐成为珠宝设计的理想宝石选择，从而 刺激市场需求。 作为刚玉家族的一员，蓝绿色蓝宝石顾名思义 混合蓝色和绿色，并呈现不同深浅度，其色调源自 晶体结构中铁和钛等微量元素，当中的比例和浓度 决定了宝石的蓝绿色彩是偏向以蓝色或绿色为主。 “蓝绿色”(teal)一词是色谱上介于蓝色和绿色 之间的特定色调，取名自拥有蓝绿色艳丽羽毛的绿 头鸭和绿翅鸭(teal ducks)，而蓝绿色蓝宝石正因其 得天独厚的原始美而备受追捧。 颜色标准 近年来，呈上GIT泰国珠宝学院进行分类的蓝绿 色蓝宝石数量飙升，证明了这种宝石的热度持续升 温。为了确保不会与蓝色蓝宝石混淆，GIT今年制定 了“蓝绿色蓝宝石”的业内颜色标准。 GIT总监Sumed Prasongpongchai表示：“过去 几年来，消费者对蓝绿色蓝宝石的兴趣激增，促使 我们制定更清晰的指引并加强推广，以统一分类方 式，尽量减少混乱。” 在标准照明条件下，宝石的颜色必须纳入比色石 的指定色彩范围内，才能符合GIT的蓝绿色蓝宝石分 类原则。当暴露在不同的光源下时，宝石不应显示任 何颜色变化，色域也不应呈现明显的带状。重量必须 为至少半克拉，且未经加热或常规加热处理。从正 面观察，宝石必须色泽均匀，亮度至少为20%。 Prasongpongchai指出，宝石颜色在标准规范下 不得落在蓝色蓝宝石比色石的指定范围内，GIT随后 会使用孟塞尔标准色卡来确定颜色名称。 他解释道：“我们已更新了分级标准并开始实 施，旨在减少消费者对蓝色蓝宝石和蓝绿色蓝宝石 的混淆。这项新标准有助确保绿蓝色蓝宝石/蓝绿色 蓝宝石不会被归类为蓝色蓝宝石。” 定制奇珍 GIT表示，蓝绿色蓝宝石凭借独特色调和稀有 度，成为传统蓝色蓝宝石或其他彩宝的理想替代 品，因此近年来需求不断增加，特别是在富现代感 的珠宝市场。 蓝绿色蓝宝石拥有百搭的色彩，与各种肤色和 金属均能够搭配得宜，也是制作订婚戒指、吊坠和 耳环等首饰的绝佳选择。其迷人色泽也深受瑰宝藏 家赏识。 此外，蓝绿色蓝宝石的莫氏硬度为9，坚固耐磨， 适合制作日常佩戴的戒指和手镯。 蓝绿色蓝宝石的产地遍及全球，并以澳大利亚、 马达加斯加和美国蒙大拿州最举世闻名。澳大利亚 品种以深邃鲜明的色彩著称，而蒙大拿州的品种通 常较浅淡雅致，独特的色域更显魅力非凡。 该类宝石的价值由多种因素决定，包括颜色、净 度、切割和克拉重量。蓝绿色彩搭配均衡、净度高且 切割出色的宝石往往价格较高。GIT指出，尺寸较大 的优质蓝绿色蓝宝石世上难求，且有可能价值不菲。
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